/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.netbeans.lib.profiler.heap;


/**
 *
 * @author Tomas Hurka
 */
class StackTrace extends HprofObject {
    //~ Instance fields ----------------------------------------------------------------------------------------------------------
    
    private final StackTraceSegment stackTraceSegment;
    
    //~ Constructors -------------------------------------------------------------------------------------------------------------
    
    StackTrace(StackTraceSegment segment, long offset) {
        super(offset);
        stackTraceSegment = segment;
        assert getHprofBuffer().get(offset) == HprofHeap.STACK_TRACE;
    }
    
    //~ Methods ------------------------------------------------------------------------------------------------------------------
    
    long getSerialNumber() {
        return getHprofBuffer().getInt(fileOffset + stackTraceSegment.stackTraceSerialNumberOffset);
    }
    
    long getThreadSerialNumber() {
        return getHprofBuffer().getInt(fileOffset + stackTraceSegment.threadSerialNumberOffset);
    }

    StackFrame[] getStackFrames() {
        HprofByteBuffer buf = getHprofBuffer();
        int frames = buf.getInt(fileOffset + stackTraceSegment.numberOfFramesOffset);
        StackFrame[] fr = new StackFrame[frames];
        long idOffset = fileOffset + stackTraceSegment.framesListOffset;
        StackFrameSegment stackFrameSegment = stackTraceSegment.hprofHeap.getStackFrameSegment();
                
         for (int i=0;i<frames;i++,idOffset+=buf.getIDSize()) {
             long frameID = buf.getID(idOffset);
             fr[i] = stackFrameSegment.getStackFrameByID(frameID);
        }
        return fr;
    }
    
    private HprofByteBuffer getHprofBuffer() {
        return stackTraceSegment.hprofHeap.dumpBuffer;
    }
    
}
